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Expired European patentEurope

Method and apparatus for demodulating an optical differential phase-shift keying signal

EP 1694017 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed February 18, 2005 and granted November 27, 2013. A European patent lasts at most 20 years from filing, so its term ended February 18, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledFebruary 18, 2005
PublishedAugust 23, 2006
GrantedNovember 27, 2013
Term endedFebruary 18, 2025
Application numberEP 05003562
Classification (CPC)H04B10/66 +1 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedFeb 18, 2005PublishedAug 23, 2006Patent grantedNov 27, 2013Term endedFeb 18, 2025

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

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